Acetylenic derivatives of 2-oxazolidinones and process of preparation

ABSTRACT

COMPOUNDS OF THE FORMULA   3-R,5-(HC*C-CH2-O-CH2-)OXAZOLIDIN-2-ONE   IN WHICH R IS: A SATURATED, STRAIGHT OR BRANCHED-CHAIN ALIPHATIC RADICAL HAVING 1 TO 6 CARBON ATOMS; AN ARYLALIPHATIC RADICAL SELECTED FROM THE GROUP CONSISTING OF BENZYL AND BENZHDRYL; A RADICAL SELECTED FROM THE GROUP CONSISTING OF PHENYL AND PHENYL SUBSTITUTED BY ONE OR MORE OF THE FOLLOWING RADICALS: HALOGEN, ALKOXY HAVING 1 TO 4 CARBON ATOMS, ALIPHATIC HAVING 1 TO 5 CARBON ATOMS, A NITROGEN CONTAINING GROUP SELECTED FROM THE GROUP CONSISTING OF NITRO AND ACETAMIDO, TRIFLUOROMETHYL, ACYL OF FORMULA-CO-R3 IN WHICH R3 IS AN ALIPHATIC RADICAL HAVING 1 TO 4 CARBON ATOMS, A RADICAL SELECTED FROM THE GROUP CONSISTING OF -COOR4 AND -CH2COOR4, IN WHICH R4 IS HYDROGEN OR AN ALKYL RADICAL HAVING 1 TO 4 CARBON ATOMS, A RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROXYL AND -OCOR5 WHEREIN R5 IS AN ALKYL RADICAL HAVING 1 OR 2 CARBON ATOMS, AN A-OR B-NAPHTHYL RADICAL.   THE COMPOUNDS HAVE MYORELAXING, SEDATIVE, ANALGESIC, ANTI-INFLAMMATORY, ANTIPYRETIC, TRANQUILIZING AND ANTICONVULSIVE PROPERTIES.

United States Patent 3,654,298 ACETYLENIC DERHVATIVESOF Z-OXAZOLI- DINONES AND PRQCESS OF PREPARATKON Colette A. Douzon, Paris, Gerard J. Huguet, Malesherbes, Claude I. Fauran and Guy M. Raynaud, Paris, and Claude J. Gouret, Mention, France, assiguors to Delalande S.A., Hauts-de-Seine, France No Drawing. Filed oar. 14, 1968, Ser. No. 767,473 Claims priority, application Great Britain, Oct. 20, 1967,

, 47,886/67 Int. Cl. (107d 85/28 US. Cl. 260--307 C 3 Claims ABSTRACT or THE DISCLOSURE Compounds of the formula i onron-cnro-onr-czcn i I C in which R is: a saturated, straight or branched-chain aliphatic radical havingl 'to 6 carbon atoms; an arylaliphatic radicalselected'from the group consisting of benzyl and benzhydryl; a radical selected' from the group consisting of phenyl and phenyl substituted by one or more of the following radicals:

halogen, alkoxy having 1 to 4 carbon atoms, aliphatic having 1 to carbon atoms,

a nitrogen containing 'group selected from the group consisting of nitro and acetamido, trifluoromethyl, acyl of formula COR in which R is an aliphatic radical having 1 tOflcarbon atoms,

a radical selected from the group consisting of -COOR and -CH COOR in which R, is hy- V drogen or an alkyl radical having 1 to 4 carbon 'atomsy a radical selected from'the group consisting of hydroxyl and OCOR wherein R is an alkyl radical having 1 or 2 carbon atoms", an izor fl-naphthyl radical.

The compounds have 'myorelaxing, sedative, analgesic, anti-inflammatory, antipyretic,tranquilizing and anticonvulsive properties.

The present invention concerns new acetylenic derivatives of 2 oxazolidinones and their processes of preparation. w

The compounds according to the present invention correspond to the general. formula:

in which n is a whole number of from'l to 4 inclusive, R and R are each an aliphatic radical having 1 to 5 carbon atoms, or R and R together with th'e nitrogen 3,654,298 Patented Apr. 4, 1972 atom form a heterocyclic ring of the morpholine, piperidine or pyrrolidine type; an arylaliphatic radical such as a benzyl or benzhydryl radical; a phenyl group which may be substituted by one or more radicals chosen from the following:

a halogen atom, an alkoxy radical having 1 to 4 carbon atoms, an aliphatic radical having 1 to 5 carbon atoms, a nitrogen-containing group, such as an amino, nitro,

or acetamido group, a trifluoromethyl radical, an acyl radical of formula COR in which R is an aliphatic radical having 1 to 4 carbon atoms, a carboxy radical such as COOH or CH COOH which radical may be esterified by an alkyl radical having 1 to 4 carbon atoms, a carbo-hydrazide group CONHNH a hydroxyl radical, which radical may be acetylated 0COCH and a or B-naphthyl radical.

The process according to the invention consists in cyclising a derivative of proparglyoxy propane of the formula:

CHr-CH-OHg-O-CHz-CECH in which A represents:

a group of the formula NH-R in which case B is a hydroxy radical, R having the same significance as in the general Formula 1,

a halogen atom, in which case B is a carbamyloxy radical,

N-substituted by the radical R as defined above,

together with B an epoxy group.

When A is a group of the formula NHR, the compounds of the present invention are prepared by reacting phosgene with a compound of the Formula 2 in an organic solvent, at a temperature below 50 C. and in the presence of an alkaline agent capable of combining with the hydrochloric acid formed during the course of the reaction. In a preferred, non-limitative, method an excess of phosgene is employed, toluene is used as the organic solvent and an alkaline hydroxide or carbonate is used as the alkaline agent to fix the hydrochloric acid formed. The desired de rivative is isolated and collected by the usual means such as evaporation of the solvent, distillation or crystallisation.

When A is a halogen atom, the compounds of the present invention are prepared by reacting the compound of Formula 2 with an alkaline agent operating in an organic solvent at a temperature below 40 C. In a preferred nonlimitative method the alkaline agent is a hydroxide such as sodium hydroxide or an alkaline alcoholate such as sodium ethylate, the halogen preferably being chlorine and the organic solvent being absolute alcohol.

The desired derivative is then isolated and collected by usual means such as the addition to the reaction medium of a liquid in whichthe derivative is insoluble, andcrys tallisation.

Finally when A and B together form an epoxy group, the compounds of the present invention, in which R is an unsubstituted or substituted aromatic radical as defined above, are prepared by reacting the compound of Formula 2 with a substituted urethane of the general formula:

EN I

in which R is an unsubstituted or substituted aromatic radical, in the presence of a tertiary amine suchvv as triethylaminepand at the meltingv temperature of the .re-

agents employed. The desired derivative is isolated and collected by usual means such as crystallisation by cooling of the reaction mixture.

The derivatives of the general Formula 1 are generally liquids when the substituent on the nitrogen atom is aliphatic, but in all other cases they are generally solid and have well-defined melting points. Certain of the derivatives form salts with mineral or organic acids, in particular those derivatives in which R is an aminoaliphatic radical or an amino-substituted phenyl radical. These salts may be prepared by conventional salification means.

The following preparations are given as non-limitative examples to illustrate the present invention.

EXAMPLE 1 5-propargyloxymethyl-3 4-chlorophenyl) -2- oxazolidinone Code No. 6784 0.20 mole -(48 g.) of 1-propargyloxy-3-(4-chlorophenylamino)-2-propanol is dissolved in 500 m1. of anhydrous toluene and 0.8 mole of anhydrous potassium carbonate is added thereto. Then a toluene solution of 20% (200 ml.) of phosgene is slowly introduced into the mixture which is allowed to cool slightly. After 3 hours of contact, the solution is filtered. The toluene is removed from the filtrate under reduced pressure: the oily residue obtained crystallised in the presence of ether. It is purified by recrystallisation from 96 ethanol. Melting point: 96 C.

Analysis.Calculated for C H ClNO (percent): C, 58.76; H, 4.55; N, 5.27. Found (percent): C, 58.57; H, 4.72; N, 5.09.

The compounds listed in Table 1 below have been prepared according to the process of Example 1, that is by cyclising a compound of Formula 2 when A is a --NH-R group.

TABLE I Molee- Bolling Melting Empirical ular point, point, B formula weight G./mm. Hg

C4H -(n) CuHnNOa 211. 25 153-163/0. 25 Ca 'I-( CtHi5NO3 197. 23 150-155/0. 25 2-(C1) CuH4- Gi H nCl 255. 70 200-204/0. 2

a 3-(F) CeH4- C13H12 68 FNOa -(OCHa) aH4 C14H1ENO4 70 s) CoHa- Cil4 %4C1 66 a 3.4-(CD2CuHa C13HnC12 93 NO: 4 a) CaH4 0141112 50 N03 3-(C1) CsHr- 013131201 79 s '(C 3) CoHr- CuHrsNOa 245. 27 60 3-(CH3) Ct 4 CuHisNOa 245. 27 50 2-(CH3) CoH4-- CuHrsNOa 5. 65 s) O 4' CuHrzFs 299. 24 180-190/0. 02

EXAMPLE 11 -propargyloxymethyl-3-phenyl-2-oxazolidinone (Code No. 66252) To 0.1 mole of 1-propargyloxy-3-chloro-2- (N-phenyl) carbamoyloxy propane in solution in 50 ml. of absolute ethanol, 0.13 mole of sodium ethylate in 60 ml. of absolute ethanol is slowly added with agitation. Precipitation of sodium chloride is observed. The mixture is heated for 1 hour at 40 C. After cooling, 100 ml. of water is added and the desired compound crystallises. Melting point=80 C.

Analysis.-Calculated for C H NO (percent): C, 67.52; H, 5.67; N, 6.06. Found (percent): C, 67.57; H, 5.88; N, 6.10.

4 The compounds listed in Table II below have been prepared according to the process of Example II, that is by cyclising the compound of Formula 2 when A is a halogen atom.

EXAMPLE III 5-propargyloxymethyl-3 -;3-naphthyl-2-oxazolidinone (Code No. 67250) 0.2 mole (23 g.) of l-propargyloxy-2,3-epoxy propane and 0.2 mole (43 g.) of B-naphthyl urethane are carefully mixed. The temperature of the mixture is rapidly increased to C. An ethanol reflux then occurs. Heating is continued for 2 hours. After cooling, the viscous compound obtained is taken up in 96 ethanol and crystallises. Melting point=78 C.

Analysis.Calculated for C H NO (percent): C, 72.58; H, 5.38; N, 4.98. Found (percent): C, 72.73; H, 5.34; N. 5.15.

The compounds listed in Table IH below have been prepared according to the method of Example III, that is by reacting a urethane of Formula 3 with a compound of Formula 2 when A and B together form an epoxy group.

The 5-propargyloxymethyl 2 exazolidinones of the present invention have been tested on animals in the laboratory and have shown myorelaxing, sedative, analgesic, anti-inflammatory, antipyretic, tranquilizing and anticonvulsive properties.

The pharmacological properties of the compounds of the invention have been studied by oral application in the following tests:

(1) Myorelaxing activity.-The antagonism exercised with respect to the mortal convulsive crises provoked by the effects of strychnine have been studied in mice.

,(2) Sedative efiecL-The reduction of the measured motility has been measured in mice by the evasion test on an inclined plane and in an actimetric cage having a luminous beam and photo-electric cells. Moreover, the potentialisation effect of an infranarcotic dose of pentothal has been studied.

(3) Analgesic elTect.-The inhibition of the painful stretchings provoked by the intraperitoneal injecting of phenyl benzo quinone has been measured in mice according to the method of Siegmund and colleagues (Proc. Soc. Exp. Biol. Med. 1957, 95, 729.31).

(4) Antiphlogistic efiect.The reduction of the underplanar oedema provoked by an injection of carragheenin has been measured in rats by means of an electric plethysometer.

(5) Antipyretic eftect.-This action has been studied muscular injection of beer yeast.

(6) Tranquilizing and anticonvulsive action-The antagonism of mortal convulsive crises provoked by cardiazol in mice and the antagonism of a supramaximal electric shock in rats have been studied.

A list of the results obtained with certain of the propargyloxymethyl-2-oxazolidinones of the present invention are set out in the following Tables IV, V, VI and VII, in which the doses are expressed in mg.

In the following tables, the term DESO means the i Efiiect of the motive The lilmblton effective dose 50, that 1s, the dose which produces the o t mzfmtemmce on a rotary e f f ex sought-after eflect in 50% of the animals tested. The term on a horizontally taut thread have been studied 1n mice. acme action in min) means the time during which the (8) Toxic eflect.--The acute toxicity has been studied effe t f th compound admini t r d i t it ximum in mice. 10 intensity.

TABLE IV Rotary rod Acute Acme Actitoxicity, action Traction, metry, Evasion, R DE50 DEM in min. DE50 DEM) DE50 1 Hypermotility.

TABLE V Antagonism Oedema of the Potentiali- Carraghenine Strychsation Siegmund nine Cardiazol, pentothal, Effect R test, DE50 DE55 DE DE percent Dose Code e734 350 100 1, 000 400 40 400 CI 45 300 Footnote at end of vtable.

Antagonism Oedema of the Potentiali- Oarraghenine Strychsation Siegmund nine, Cardiazoi, pentothal, Efiect, R 1 test, DEM: DEw DE DEED percent Dose 1 No experiment carried out.

TABLE VI Rotary rod Acute Acme Trac- Actimtoxicity, action tion, etry, Evasion, R DL DEm in min. DE50 DEso DEW Code:

Ha C O HaC O O-0 0 CH5 67280 1,000 30 1,000 5 0 H O O C q 7 1 1 No expgriment carried out.

TABLE VII Antagonism Oedema of the Potentialicarragheenin Strychsation Siegmund nine Cardiazoi, pentothai, Efieot R test, DE 0 DE 0 DE 50 DE 50 percent Dose Code:

TABLE VII.Continued Antagonism Oedema of the Potentiali- Carraghenine Stryohsation a Slegmund nine, Cardiazol, pentothal, Efiect, R v test, DE DE DE DE percent Dose 67403 Q 0 Fa 55 75 140 200 30 200 90 35 1, 000 225 40 150 671mm" H 6 o--'- 40 300 CH 0 200 500 400 250 20 200 H30 0 0 OH:

-C 0 CH Cl #700 185 1, 000 800 35 400 67m- 000 I No experiment carried out.

From the Tables IV, V, VI and VII, the novel oxazolidinones show:

A myorelaxing effect characterised by a very marked antistrychnine effect. The derivatives in which -R=m chlorophenyl, m-bromophenyl and p-methoxy phenyl counteract the lethal effects of strychnine in oral doses of less than mg./ kg.

A sedative effect diminishing the measured motility and potentialisation of barbituric narcosis. The derivatives in which R=o-trifluoromethylphenyl, o-chlorophenyl and a-naphthyl are active in this domain in oral doses of less than 100 mg./kg.

A marked analgesic effect. This effect is accompanied by an antistrychm'ne effect. The derivatives in which R=ptrifluoromethyl phenyl, o-trifluoromethyl phenyl, p-methoxyphenyl and a-naphthyl exercise an effect on the Siegmund test in oral doses of less than 100 mg./kg., without modifying the measured motility.

An antiphlogistic effect manifestly observed in oral doses of 200 mg./kg. for the derivatives in which R: propyl, o-chlorophenyl, m-fluorophenyl, p-trifiuoromethyl phenyl and p-methoxyphenyl.

An interesting tranquilizing and anticonvulsive effect which is complementary to the properties of sedatives and myorelexants.

Moreover, the toxic effects are only slightly pronounced and the action on the motive coordination does not appear except on stronger doses.

Also, the substituted 2-oxazolidinones exercise an antipyretic efiect in doses which are non-hypothermisant by themselves.

The 5 propargyloxy 2 oxazolidinones may be administered in therapeutically acceptable form such as tablets and capsules in doses of 25 and mg.

What We claim is:

1. A compound of the formula:

in which R is selected from the group consisting of:

an alkyl radical having 1 to 6 carbon atoms;

an arylaliphatic radical selected from the group consisting of benzyl and benzhydryl;

a radical selected from the group consisting of phenyl and phenyl substituted by one or more of the following radicals:

halogen,

alkoxy having 1 to 4 carbon atoms,

methyl or isopropyl,

a nitrogen containing group selected from the group consisting of nitro and acetamido,

trifluoromethyl,

a radical selected from the group consisting of -COOR and CH COOR in which R is hydrogen or an alkyl radical having 1 to 4 carbon atoms,

11 2 a radical selected from the group consisting of drogen or an alkyl radical having 1 to 4 carbon hydroxyl and OCOR wherein R is an alkyl atoms, radical having 1 or2carbon atoms, a radical selected from the group consisting of an ozor fl-naphthyl radical. hydroxyl and OCOR in which R is an alkyl 2. A compound as defined in claim 1, in which R is 5 radical having 1 or 2 carbon atoms. selected from the group consisting of 3. A compound as defined in claim 1, in which R is phenyl and phenyl. phenyl substituted by one or more of the following References Cited gfizg 10 UNITED STATES PATENTS an alkoxy having 1 to 4 carbon atoms 3,152,141 10/ 1964 Touslgnant 260307 metllyl or ALEX MAZ'EL, Primary Examiner a mtrogen containing group selected from the r group consisting of nitro and acetamido, Asslstant Examine? trifiuoromethyl, l6 c c US. Cl. X.R.

COOR and -CH COOR in which R; is hy- 260-247.2 A,B, 294.3 B; 424248, 267, 272 

